Revision D MAC 1200 resting ECG analysis system 9-7
2012250-095
Specifications: Basic Information
Signal Transmission
Patient Input to Recording
After lead formation and digitization, simultaneous transmission of all electrode
signals to the digital processing system; muscle filter, AC filter, pacing pulse
identification, automatic or manual sensitivity adjustment, automatic baseline
adjustment and drift compensation by means of the anti-drift system (A.D.S.) can be
enabled or disabled simultaneously for all channels; digital output of processed
signals via thermal-array printhead.
Low cut-off frequency (–3 dB limits) 0.08 Hz, equivalent to a time constant of
2.04 seconds
High cut-off frequency (3 dB limits) operating mode: 12 Lead, 6 Lead 150 Hz
(IEC/AHA) operating mode: Arrhy 100 Hz (IEC)
Signal sampling rate: 1000/s
Resolution, referred to the input 5 µV
Output rate to recorder 2000/s
For all leads, gain adjustment in four steps: 40-20-10-5 mm/mV
With active muscle filter (low-pass characteristic) 3-dB drop of the amplitude
frequency response at approximately 40 or 20 Hz
With active AC line filter detection and compensation of periodic 50 or 60 Hz
frequency components (depending on recorder model) attenuation >40 dB
Non-linear distortion below values specified in IEC and AHA
recommendations
Coincidence error limits between any two channels ±0.5 mm
Detection of pacer pulses in V2 or other V leads and marking in all channels for
signals referred to patient input
Duration >0.1 ms, amplitude >5 mV
Noise in the signal transmission path below values specified in IEC and AHA
requirements:
<2.5 µV rms
Common-mode rejection for 50 or 60 Hz signals (depending on recorder model)
with AC filter switched on >140 dB
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